| 摘要 |
PROBLEM TO BE SOLVED: To provide a valve which can suppress the deformation of seats when handling valve discs by vertically laminating them.SOLUTION: A valve V comprises a valve disc 1 which partitions one chamber A and the other chamber B, and annular-plate shaped leaf valves 2 and 3 laminated at both sides of the valve disc. The valve disc 1 includes annular boss parts 10 and 11 which are formed at both sides thereof, and support the leaf valves 2 and 3, and seats 12 and 13 which are formed at external peripheral sides of the boss parts 10 and 11, and to/from which the leaf valves 2 and 3 are landed and separated. One or both of the seats 12 and 13 of one chamber and the other chamber are arranged in positions higher than both the boss parts 10 and 11 at the same side, and an external peripheral end t1 of the seat 12 at one chamber side is arranged at an external peripheral side rather than an external peripheral end t3 of the seat 13 at the other chamber side. The valve disc 1 includes an auxiliary seat 16 which is formed at an external peripheral side of the seat 13 at the other chamber side, and arranged at a height which is the same as the seat 13 or higher than the seat. |
